Enjoy :)
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"It's games night and Steve still isn't down here," Tony complained, "does anyone know where he is?"
"He went up to his room a few hours ago," Natasha answered, not looking up from her phone, "I'm pretty sure he took Bucky with him."
"Clint, would you mind going to fetch them?"
"Uhh yes, I would mind. Do it yourself," Clint sassed.
"Fine I'll go."
Tony got up and headed towards the elevator.
Bruce smiled at Natasha, "they're fucking aren't they?"
"Yup," she laughed.
Thor let out a loud laugh as he slapped his knee.
"Jesus Christ Buck!" Steve yelled as Bucky pounded into him.
"You like that?" He smirked.
"Yes, harder!"
"Ahem," JARVIS spoke, "sorry to interrupt, but Mr Stark is currently on his way here."
Bucky pulled out, "what do we do?" He asked Steve.
"We give him a show, make sure to be extra vocal."
The elevator dinged and the doors opened. Tony stood there wide mouthed on what he had walked in on.
Both soldiers were on their knees. Steve's back was pressed against Bucky's stomach. The winter soldiers arms were wrapped around his lovers torso, his cock buried balls deep in his ass. The captains head was turned around as much as it could with his lips locked with Bucky's.
"Uhh," Tony stammered.
The soldiers lips broke apart as Steve shot him a glare. Steve leant down and put his elbows on the bed.
"We're busy," Bucky said, turning his attention back to Steve. He pulled out his cock completely and slammed it back into him earning a strangled moan from the blonde. He kept repeating this until Steve was almost at his climax.
"I, um, you..."
Bucky looked back at Tony, "you either join or leave us alone."
Steve turned his head to look up at the brunette, "pl-please don't stop Buck."
He broke his eye contact with Tony and turned his attention to what was infront of him. He rubbed his hand on Steve's perfectly chiseled ass, then started thrusting into him again.
Steve moaned, "harder!"
Bucky obliged and pounded harder.
"Oh my god, James, right there right there right there, OH MY!"
"Steve you're killing me," Bucky moaned.
Tony pressed the elevator button around 20 times, just trying to get out of there. The doors didn't close as fast as he was hoping. Bucky released into Steve's ass, making Steve reach his climax and cum all over the bed. Bucky pulled out. Steve's ass leaked with the soldiers cum. The winter soldier put his face down to Steve's entrance and started to lick him clean.
The doors closed leaving that image planted in his brain. He could still hear strangled moans from the two about 2 floors down. Tony walks out of the elevator to find Natasha, Clint, Thor, Bruce, Rhodey and Pepper all laughing at him.
"How was it?" Rhodey giggled.
"I think I'm scarred for life. I mean, I've been with men before, but I've never been as aggressive and horny as them two."
Natasha grinned, "maybe you should've asked JARVIS if it was ok to walk in on them."
"Yeah, I'll keep that in mind."
10 minutes later, Steve and Bucky appeared at the bottom of the elevator hand in hand.
"Hey," Steve spoke, "what'd we miss?"
"I think Tony is scared," Bruce laughed.
Bucky and Steve smiled at eachother as Tony avoided eye contact.
"Serves you right Tony, maybe you should respect eachothers privacy a bit more."